Fix GLSL array instantiation syntax for glStencilViewer
Fix GLSL array instantiation syntax for glStencilViewer

fixes #263

shengfuintel/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,takahito-tejima/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,xldeveloper/OpenSubdiv,jcowles/OpenSubdiv,poljere/OpenSubdiv,lookup1980/OpenSubdiv,c64kernal/OpenSubdiv,poljere/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,shengfuintel/OpenSubdiv,jcowles/OpenSubdiv,nyotis/OpenSubdiv,xldeveloper/OpenSubdiv,lookup1980/OpenSubdiv,nyotis/OpenSubdiv,takahito-tejima/OpenSubdiv,c64kernal/OpenSubdiv,poljere/OpenSubdiv,c64kernal/OpenSubdiv,jcowles/OpenSubdiv,nyotis/OpenSubdiv,anshuarya/OpenSubdiv,takahito-tejima/OpenSubdiv-exp,anshuarya/OpenSubdiv,anshuarya/OpenSubdiv,shengfuintel/OpenSubdiv,takahito-tejima/OpenSubdiv,lookup1980/OpenSubdiv,xldeveloper/OpenSubdiv